On the back calculation of material strength values from strength test results

Schagerl, Martin; Grillenberger, Markus

doi:10.1002/pamm.201800342

Proc Appl Math and Mech

2018

DOI: 10.1002/pamm.201800342

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On the back calculation of material strength values from strength test results

Martin Schagerl

Markus Grillenberger

Abstract: This is an open access article under the terms of the Creative Commons Attribution-Non-Commercial-NoDerivs Licence 4.0, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Enhanced characterization of the yield behavior of sheet metal at torsional load using digital image correlation methods

Grillenberger

Schagerl

2020

Continuum Mech. Thermodyn.

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This work describes an approach for strain determination at the “in-plane” torsional test using digital image correlation (DIC) without brushing a statistical pattern on the specimen. It is well known that the in-plane torsion test represents a appropriate test method for material characterization of sheet metal in terms of yielding and kinematic hardening (Wagner et al. in Application of the in-plane torsion test in an industrial environment—recent advances and remaining challenges. In: Conference Paper of the 12th Forming Technology Forum, Herrsching, Germany, 2019). However, the gained measurement data do not allow the exact reading of material models for direct use in numerical analysis. The determination of shear values represents thereby the main challenge. Besides well-established methods for stress–strain analysis mentioned in this contribution, the applicability of DIC methods for the direct reading of distortion on the specimen has been investigated. Therefore, a torsion test rig has been developed and torsion tests using specimen out of mild- and high-strength steel have been conducted. The in-plane situation allows the distortion tracking of single points on the specimen by using a 2D image correlation software. The needed pictures were taken by using a common digital lens reflex camera. It has been shown that the resolution of the inherent specimen pattern is sufficient for the use of common 2D image correlation software. Torsional test results in the form of computed yield curves of mild- and advanced high-strength steels are aimed to be presented in this contribution.

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Enhanced characterization of the yield behavior of sheet metal at torsional load using digital image correlation methods

Grillenberger

Schagerl

2020

Continuum Mech. Thermodyn.

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Shear property measurement of additively manufactured continuous fibre reinforced plastics by in-plane torsion testing

Sieberer

Savandaiah

Leßlhumer

et al. 2022

Additive Manufacturing

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On the back calculation of material strength values from strength test results

Abstract: This is an open access article under the terms of the Creative Commons Attribution-Non-Commercial-NoDerivs Licence 4.0, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

Cited by 2 publications

References 3 publications

Enhanced characterization of the yield behavior of sheet metal at torsional load using digital image correlation methods

Enhanced characterization of the yield behavior of sheet metal at torsional load using digital image correlation methods

Shear property measurement of additively manufactured continuous fibre reinforced plastics by in-plane torsion testing

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